freightliner MC - Foot Brake Valve Actuator Lubricating

–20°F (–29°C) and above. If the operating tempera-
ture is below –20°F (–29°C), use a low-temperature
extreme-pressure grease.
Meritor
Lubricate the slack adjuster at the grease fitting until
grease is forced past the pressure-relief capscrew or
past the gear splines around the inboard snap ring.
Use high-temperature, NLGI Grade 1 waterproof
grease. See
Fig. 7.
Bendix
Using a quality multipurpose chassis lubricant, NLGI
Grade 2, lubricate the automatic slack adjuster
through the lube fitting. See
Fig. 8. Lubricate the
slack adjuster until clean lubricant flows from the
grease relief opening in the boot.
42–06 Foot Brake Valve
Actuator Lubricating
1. Clean any dirt, gravel, and other foreign material
from the base of the brake pedal, the plunger
boot, and the brake base bracket.
2. Use light oil to lubricate the brake pedal roller
and pivot pin.
3. Check the brake plunger boot for cracks, holes,
or deterioration. Replace it if necessary.
4. Lift the edge of the brake plunger boot and
check the plunger for existing lubrication.
4.1 If the plunger is dry, remove it by remov-
ing the brake pedal and brake plunger
boot. Lubricate the plunger and the inside
surface of the boot with barium grease
(p/n BW 246671) or Pennzoil Adhezoplex
EP2. Install the plunger, boot, and the
brake pedal.
IMPORTANT: Use only these approved lubri-
cants.
4.2 If the plunger has grease on it, lift the
edge of the brake plunger boot enough to
apply 2 to 4 drops of light oil around the
brake plunger, where it slides into the
brake base bracket. Install the plunger
boot around the brake base bracket.
f420012a
10/20/93
1
2
3
4
5
6
7
1. Brake Chamber
2. Clevis
3. Actuator Rod
4. Boot
5. Pull-Pawl Seal
6. Manual Adjusting Nut
7. Grease Fitting (or
Lube Plug)
Fig. 7, Meritor Automatic Slack Adjuster (other slack
adjustors are similar)
06/17/2010 f430511
1
2
2
3
3
4
5
6
7
7
1. Yoke
2. Yoke Pin
3. Link Pin
4. Link
5. Boot
6. Lube Fitting
7. Worm Gear
Fig. 8, Bendix Automatic Slack Adjuster
Brakes 42
Recreational Vehicle Chassis Maintenance Manual, July 2018 42/7